All-solid-state battery

Abstract

This all-solid-state battery includes a laminate in which a positive electrode layer and a negative electrode layer are alternately laminated with a solid electrolyte layer interposed therebetween. The positive electrode layer includes a first positive electrode end portion exposed on a first side surface of the laminate. The negative electrode layer includes a second negative electrode end portion not exposed on the first side surface of the laminate. The all-solid-state battery includes a first uneven part formed on the first side surface of the laminate.

The invention claimed is: 
     
       1. An all-solid-state battery comprising a laminate in which: a positive electrode layer including a positive electrode current collector layer and a positive electrode active material layer; and a negative electrode layer including a negative electrode current collector layer and a negative electrode active material layer, are alternately laminated with a solid electrolyte layer interposed therebetween, wherein
 the positive electrode layer includes a first positive electrode end portion exposed on a first side surface of the laminate and a second positive electrode end portion not exposed on a second side surface on a side opposite to the first side surface, 
 the negative electrode layer includes a first negative electrode end portion exposed on the second side surface of the laminate and a second negative electrode end portion not exposed on the first side surface of the laminate, and 
 the laminate includes at least one of a first uneven part formed on the first side surface of the laminate and a second uneven part formed on the second side surface of the laminate, 
 the laminate includes a third side surface positioned to a lateral side of the first side surface and the second side surface, 
 the positive electrode layer includes a third positive electrode end portion positioned to a lateral side of the first positive electrode end portion and the second positive electrode end portion and configured to be exposed on the third side surface, 
 the negative electrode layer includes a third negative electrode end portion positioned to a lateral side of the first negative electrode end portion and the second negative electrode end portion and configured to be exposed on the third side surface, and 
 a third uneven part is provided to be formed on the third side surface of the laminate. 
 
     
     
       2. The all-solid-state battery according to  claim 1 , wherein the laminate further includes:
 a positive electrode margin layer disposed between the second positive electrode end portion and the second side surface and interposed between two solid electrolyte layers adjacent to each other; and 
 a negative electrode margin layer disposed between the second negative electrode end portion and the first side surface and interposed between two solid electrolyte layers adjacent to each other. 
 
     
     
       3. The all-solid-state battery according to  claim 2 , wherein a ten-point average roughness Rzjis of the first side surface is 1.0 μm or more in a lamination direction of the laminate. 
     
     
       4. The all-solid-state battery according to  claim 3 , wherein the ten-point average roughness Rzjis of the first side surface is 12.0 μm or less in the lamination direction of the laminate. 
     
     
       5. The all-solid-state battery according to  claim 2 , wherein a first protruding part of the first uneven part is formed by the first positive electrode end portion, and a first recessed part of the first uneven part is formed by the solid electrolyte layer and the negative electrode margin layer. 
     
     
       6. The all-solid-state battery according to  claim 2 , wherein a first protruding part of the first uneven part is formed by the solid electrolyte layer and the negative electrode margin layer, and a first recessed part of the first uneven part is formed by the first positive electrode end portion. 
     
     
       7. The all-solid-state battery according to  claim 2 , wherein a ten-point average roughness Rzjis of the second side surface is 1.0 μm or more in the lamination direction of the laminate. 
     
     
       8. The all-solid-state battery according to  claim 7 , wherein the ten-point average roughness Rzjis of the second side surface is 12.0 μm or less in the lamination direction of the laminate. 
     
     
       9. The all-solid-state battery according to  claim 2 , wherein a second protruding part of the second uneven part is formed by the first negative electrode end portion, and a second recessed part of the second uneven part is formed by the solid electrolyte layer and the positive electrode margin layer. 
     
     
       10. The all-solid-state battery according to  claim 2 , wherein a second protruding part of the second uneven part is formed by the solid electrolyte layer and the positive electrode margin layer, and a second recessed part of the second uneven part is formed by the first negative electrode end portion. 
     
     
       11. The all-solid-state battery according to  claim 1 , wherein a ten-point average roughness Rzjis of the first side surface is 1.0 μm or more in a lamination direction of the laminate. 
     
     
       12. The all-solid-state battery according to  claim 11 , wherein the ten-point average roughness Rzjis of the first side surface is 12.0 μm or less in the lamination direction of the laminate. 
     
     
       13. The all-solid-state battery according to  claim 1 , wherein a first protruding part of the first uneven part is formed by the first positive electrode end portion, and a first recessed part of the first uneven part is formed by the solid electrolyte layer. 
     
     
       14. The all-solid-state battery according to  claim 1 , wherein a first protruding part of the first uneven part is formed by the solid electrolyte layer, and a first recessed part of the first uneven part is formed by the first positive electrode end portion. 
     
     
       15. The all-solid-state battery according to  claim 1 , wherein a ten-point average roughness Rzjis of the second side surface is 1.0 μm or more in the lamination direction of the laminate. 
     
     
       16. The all-solid-state battery according to  claim 15 , wherein the ten-point average roughness Rzjis of the second side surface is 12.0 μm or less in the lamination direction of the laminate. 
     
     
       17. The all-solid-state battery according to  claim 1 , wherein a second protruding part of the second uneven part is formed by the first negative electrode end portion, and a second recessed part of the second uneven part is formed by the solid electrolyte layer. 
     
     
       18. The all-solid-state battery according to  claim 1 , wherein a second protruding part of the second uneven part is formed by the solid electrolyte layer, and a second recessed part of the second uneven part is formed by the first negative electrode end portion. 
     
     
       19. The all-solid-state battery according to  claim 1 , wherein a ten-point average roughness Rzjis of the third side surface is 1.0 μm or more in the lamination direction of the laminate. 
     
     
       20. The all-solid-state battery according to  claim 19 , wherein a ten-point average roughness Rzjis of the third side surface is 12.0 μm or less in the lamination direction of the laminate. 
     
     
       21. The all-solid-state battery according to  claim 1 , wherein a third protruding part of the third uneven part is formed by at least one of the third positive electrode end portion and the third negative electrode end portion, and a third recessed part of the third uneven part is formed by the solid electrolyte layer. 
     
     
       22. The all-solid-state battery according to  claim 1 , wherein a third protruding part of the third uneven part is formed by the solid electrolyte layer, and a third recessed part of the third uneven part is formed by at least one of the third positive electrode end portion and the third negative electrode end portion.